MSVC nmake builds use the same pdb file for compiling and linking

MSVC nmake builds use by default the same pdb file for compiling and linking: $$TARGET.pdb (simplified).
This can result in corrupted PDB files and longer build times.

The PDB created by the compiler and the PDB created by the linker are different beasts and should be kept separately. Also, the intermediate nature of the compiler's PDB suggests that they should not be added to the distclean but the clean target.

References:

• https://cmake.org/Bug/view.php?id=14062
• https://blogs.msdn.microsoft.com/yash/2007/10/12/pdb-files-what-are-they-and-how-to-generate-them/